Messages in this thread | | | Subject | Re: Kernel Threads question on 2.4 | From | Robert Love <> | Date | 03 Feb 2003 19:59:30 -0500 |
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On Mon, 2003-02-03 at 19:52, Akram.Abou-Emara@nokia.com wrote:
These questions might be better asked on the kernelnewbies list...
> Do kernel threads get preempted? Or do they have to > give up the CPU on their own?
Without the preemptive kernel, they are not preemptive. With preempt-kernel, they are. They tend to run at elevated priorities anyhow, so this is not so much of an issue.
> Are there any rules for what scheduling policies and > priority a kernel thread can have? > reparent_to_init()sets the scheduling policy to > SCHED_OTHER. Do you see a problem with changing the > scheduling policy to SCHED_FIFO?
kernel threads can have any scheduling policy or priority - they really do not differ much from regular threads (sans the lack of address space).
Some kernel threads do indeed run with real-time policy.
Robert Love
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